The stomps certainly look the worst when he connects. But they're all right up there. Crocop's head kicks were almost unbelievable he used do it at will. Rampage's slam of Ricardo Arona also comes to mind.

If it's Anderson;s knees while in a thai clinch, I'd have to go for that. Not only is it scary as hell not being able to see what is about to hit you, it is so damn irritating to be completely controlled by your head/neck.